Apparatus for making nuts



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APPARATUS FOR MAKING NUTS Filed 001:. 25, 1935 2 Sheets-Sheet l INVENTOR. /7/v/?Y v. #0605 ATTORNEYS H. J. HOGUE APPARATUS FOR MAKING NUTS Filed 001:. 25, 1935 2 Sheets-Sheet 2 l.\'\ 'ENTOR. Haw/qr M H0605 Patented June 30, 1936 UNITED STATES PATENT OFFICE APPARATUS FOR MAKING NUTS Application October 25, 1935, Serial No. 46,749

6 Claims.

This invention relates to apparatus for making nuts for bolts and is an improvement in the apparatus covered by my prior Patent No. 1,982,054, granted November 27, 1934.

It is one of the objects of the present invention to provide an apparatus for automatically making nut blanks from round rod stock and to have the apparatus so designed that the various parts of the apparatus will be capable of performing their respective functions without being subjected to undue stresses or overloads, whereby the apparatus will be capable of operating continuously and satisfactorily for long periods without interruption.

Other objects of the invention and the features of novelty-will be apparent from the fol lowing description taken in connection with the accompanying drawings, of which Fig. 1 is a plan view of a machine embodying my invention;

Fig. 2 is an enlarged elevation of the stock flattening mechanism;

Fig. 3 is a plan view thereof and is an enlargement of a certain part of Fig. 1;

Fig. 4 is an elevation of the operating face of the anvil;

Fig. 5 is a plan view of the anvil;

Fig. 6 is an elevation of a section of the stock illustrating the various stages of the flattening 30 operation;

Fig. 7 is a section on the line 11 of Fig. 6;

Fig. 8 is a section on the line 8-8 of Fig. 6; and

Fig. 9 is a section on line 99 of Fig. 6.

Referring to the drawings, i indicates the frame of the machine and H a cross-head which reciprocates in the ways 12. The main power shaft of the machine is indicated at 13 and has a fly-wheel l4 thereon and a cam l which oo- 40 operates with the roller 16, in the cross-head H, to move the latter on its operating stroke. The shaft l3 also carries a cam I! which cooperates with a roller I8 on a rocker device l9 and this rocker device is connected with the cross-head l6 by rods and operates to move the crosshead II on its return or idle stroke. The extension 2| of the cross-head ll carries a countersink 22, a piercing punch 23 for making the hole in the nut, and the blanking punch 24 which cuts the nut blank from the stock. For a detailed description of the parts 22, 23 and 24 and the dies with which they cooperate, reference may be had to my prior Patent No. 1,982,054, as these form no part of the present improvements.

The stock is indicated at 25 and moves through the machine, from left to right, in Fig. 1. The round stock enters the machine through a guide bushing 26 which is supported on a bracket 21 on the frame of the machine and has an opening therein, for the stock, which is considerably larger than the diameter of the stock but adapted to straighten the stock as it passes therethrough. An anvil 28 has a shank 29 thereon which is mounted in a suitable opening in the boss 30 on the bracket 21 and is secured therein by means of the bolt 3|. The anvil 28 has a flat operating face 32 which is parallel with the direction of the stock through the machine, and also a face 33 which is arranged at a slight angle to the face 32 (see Figs. 4 and 5), and the face 33 has a central projecting rib 34 that is adapted to groove the stock, as indicated at 35 in Figs. 6 and 8.

A lever 36 is fulcrumed on a pivot 31 which is secured on the bracket 21. The upper end of the pivot 31 is supported by a bracket 38 that is secured to the bracket 21 by bolts 39. The lever 36 carries a die which is secured to the lever by means of the dove-tail 4|. When the lever 36 is'swung on its pivot the die 40 moves to the dotted position shown at 42 in Fig. 3, and it will be noted that the operating faces of the die 40 are similar to those of the anvil 28 so that when the die is in the position shown at 42 it cooperates with the anvil to flatten the stock, as will be described more in detail hereinafter.

The lever 36 has pivotally attached thereto a connecting rod 43 and this connecting rod is also pivotally attached to the cross-head II, as indicated at 44, and, in order to relieve the pivot 44 of some of the load to which it would be otherwise subjected, I provide a rounded pocket 45 in the crosshead II and the rounded end of the rod 43 bears against the surface of this pocket.

The stock feed rolls are indicated at 46 and are intermittently rotated by means of gearing, which is indicated at 41 in Fig. 2, and this gearing is actuated by any suitable mechanism such as is commonly used in the art in machines of this kind and which will not be described herein because it forms no part of the present invention.

In the operation of the machine the stock is intermittently fed into the machine by means of the rolls 46 and, between the feeding movements, the cross-head ll moves forward to cause the tools 22, 23 and 24 to operate on the flattened stock. As the cross-head H moves forward the lever 36 is actuated to move the die 40 toward the stock and when the die engages the stock it presses it against the anvil 28. The faces 33 on the anvil 28 and the die 40 operate on the stock to change it from the round cross-section shown in Fig. 7 to the flattened cross-section shown in Fig. 8, and the ribs 34 on the anvil and die form the grooves 35 in the opposite sides of the stock, these grooves serving to spread the stock vertically. The portion of the stock that is between the faces 32 on the anvil and die is further flattened and these faces serve to obliterate the grooves 35 so that, when the stock passes from between the anvil and the die, it is flattened to a cross-section substantially as indicated in Fig. 9, and the stock then passes between the feed rolls 46 and in a position to be operated on by the tools 22, 23 and 24.

From the foregoing description it will be evident that my invention relates to the mechanism for effecting the flattening of the stock from the round cross-section indicated in Fig. '7, to the substantially rectangular cross-section shown in Fig. 9, and that the mechanism for forming the nut blanks from the flattened stock may he of any suitable or preferred construction, since it forms no part of my invention. It will be understood that for the purposes of illustrating my invention I have shown an embodiment thereof in a common form of nut blanking machine which is adapted to operate on rectangular stock, but it will be apparent that the details of construction of the embodiment of my invention which has been illustrated and described, are subject to variation without departing from the spirit of the invention as defined in the appended claims.

Having thus described my invention, I claim:

1. In apparatus for making nuts, the combination of reciprocating mechanism for piercing and severing nut blanks from red stock, means for intermittently feeding the stock, and means for flattening the stock comprising an anvil adjacent the path of the stock, a lever actuated in synchronism with said reciprocating mechanism,

' and a die actuated by said lever and cooperating with said anvil.

2. In apparatus for making nuts, the combination of reciprocating mechanism for piercing and severing nut blanks from rod stock, means for intermittently feeding the stock, and means for flattening the stock comprising an anvil adjacent the path of the stock and having a substantially flat face to engage the stock and a rib for grooving the stock before it reaches said face, a lever actuated in synchronism with said reciprocating mechanism, and a die actuated by said lever and cooperating with said anvil, said die having a substantially flat face and a rib opposed, respectively, to the flat face and rib on said anvil.

3. In apparatus for making nuts, the combination of reciprocating mechanism for piercing and 5 severing nut blanks from rod stock, a pair of feed rolls for intermittently feeding the stock, and means for flattening the stock in advance of said feed rolls comprising an anvil adjacent the path of the stock, a lever actuated by said reciprocat- 1 ing mechanism, and a die carried by said lever and cooperatingwith said anvil.

4. In apparatus for making nuts, the combination of reciprocating mechanism for piercing and severing nut blanks from rod stock, a pair of 15 feed rolls for intermittently feeding the stock, and means for flattening the stock between said die and said roll comprising an anvil adjacent the path of the stock, a lever actuated by said reciprocating mechanism, and a die carried by 20 said lever and cooperating with said anvil, said anvil and the last mentioned die having opposed ribs, for grooving and spreading the stock, and cooperating flat surfaces which additionally spread the stock and obliterate the grooves 25 formed therein by said ribs.

5. In apparatus for making nuts, the combination of reciprocating mechanism for piercing and severing nut blanks from rod stock, means for intermittently feeding the stock, and means for 30 flattening the stock from a round cross-section prior to the action of said mechanism thereon, said last mentioned means comprising an anvil adjacent the path of the stock and an oscillating die supported independently 01' said mechanism 35 but actuated in synchronism therewith.

6. In apparatus for making nuts, the combination of reciprocating mechanism for piercing and severing nut blanks from rod stock, means for intermittently feeding the stock, and means for 40 flattening the stock from a round cross-section prior to the action of said mechanism thereon, said last mentioned means comprising an anvil adjacent the path of the stock and an oscillating die supported independently of said mechanism 45 but actuated in synchronism therewith, said anvil and said die each having two faces in angular relation which operate on stock, and one of said faces on the anvil and one of said faces on the die each having a rib which form grooves in the opposite sides of the stock, and the other of said anvil and die faces cooperating to spread the stock and obliterate said grooves.

HENRY J. HOGUE. [I 

